Air-heating stove for blast-furnaces and gas-producers



T. .ARAMAKI.

AIR HEATING STOVE FOR BLAST FURNACES AND GAS PRODUCERS.

APPLICATION FILED APR. 30, I9I9. 1,357,675.

F Patented Nov. 2, 1920.

2 SHEETS-SHEET I- l/VVENTOR /M' A ORA/E V T.ARAMAKI. AIR HEATING STOVEFOR BLAST FURNACES AND GAS PRODUCEBS.

' APfLICATlON FILED APR. 30, 19H].

1 ,357,675, Patented Nov. 2, 1920.

2 SHEETS-SHEET 2- UNITED STATES PATENT OFFICE.

TAKEKICHI ARAMAKI, OF TOKYO, JAPAN.

Specification of Letters Patent.

Patented Nov. 2, 1920.

Application filed April 30, 1919. Serial No. 293,653.

To all whom it may concern:

Be it known that I, TAKEKICHI ARAMAKI, a subject of the Emperor ofJapan, and a resident of No. 18 Koun-Gho, Mita, Shiba- Kn, Tokyo, Empireof Japan, have invented a new and useful Improvement in Air-1-leatingStoves for Blast-Furnaces and Gas-Producers, of which the following is aspeciiication.

This invention has reference to a new and useful improvement in gasproducers and air heating stoves for blast furnaces, both working underpressure and heat, wherein the brick wall which constitutes the body orshell of the furnace is entirely covered with reinforced concrete,instead of an ordinary iron plate.

The object of the invention is to provide a furnace of this characterwhich will be strong, durable, economical, efficient and easy tomanufacture.

Further objects of this invention are to provide a furnace of thecharacter described which will eliminate the use of the anti-corrosivematerials such as are necessary when the outer wall of the furnace ismade of metal, and lastly to provide a perfectly tight wall for thefurnace so as to prevent the leakage of the gas and air.

With the above object in view my inventien has particular relation tocertain novel features in which the outer wall surrounding the brickwork of the furnace is essentially made of reinforced concrete,substantially in substitution of metallic wall.

The form of the furnace and general details of construction which may bevaried to suit the circumstances, and which are obviously within theprovince of the designer, and which form no part of the invention, neednot be fully described.

The accompanying drawings illustrate, by way of example, one applicationof the invention, wherein Figure 1 is a longitudinal sectional elevationof the heating stove as applied to Roberts type.

Fig. 2 is a longitudinal sectional elevation showing the invention asapplied to Dowsons gas producer. L in these drawings the brick workwhich forms the body of the furnace is designated by the referencenumeral 1. 2 is the refractory brick lining thereof. 3 is the reinforcedconcrete in question covering entire outer surface of the brick work,which is completed by mixing with suitable water proof material or bycoating with coal tar in order to make it water proof, if necessary.

The building of furnaces as heretofore constructed with a metallic outerwall has been accompanied with several disadvantages that it not onlyenhances the cost of manufacture by using expensive iron but at the sametime complicates the assemblage of the parts, especially when there is.a possibility of involving additional work and labor for preventingleakage of the gas and air.

By the employment of concrete which is noncorrosive, and comparativelyheat nonconductive, in lieu of iron plate, I am enabled, besidesovercoming the above disadvantages, to provide a durable, eflicient butnovel furnace, and in fact the above advantages have not been obtainedheretofore.

What I claim as my invention, and desire to secure by Letters Patent ofthe United States, is

An air heating stove for blast furnace and gas producer, having a bodyprovided with a brick wall, a refractory brick lining on the inner sideof said wall, and a reinforced comparatively heat non-conductingconcrete covering on the outer surface of said brick wall.

In testimony whereof I affix my signature in presence of two witnesses.

TAKEKIGHI ARAMAKT Witnesses H. YASUMURA, M. OTSUKA,

